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Capacity planning

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Hello,

I have come to an interresting subject, if we have a
distributed database and a webserver and HTML files
and you want to do a capacity planning of your webserver
this will complicate the things, cause the database server
must be modelized as an hyperexponential distribution that
is an M/G/1 queuing system , but as you have noticed since the
database server system , in our network , come before the internet 
connection that will be modeled as an M/M/1 queuig system, so you have 
to use a queuing network simulation to solve this problem , but if you 
have noticed, in capacity planning we have also to calculate the 
response time of the worst case performance, so this will easy the
job for us cause in the worst case scenario since the M/G/1 queuing 
system of the database server have three exponential distributions for 
the reads and writes and deletes transactions, so we have to choose the 
worst service time that is exponential distributed , so i think we have 
to choose only the  exponential distribution of the writes transactions, 
so this will make the queuing system of the database server a markovian 
M/M/1 queuing system, so this will transform our queuing network into a 
Jackson network so this will easy for us to calculate the response time 
of our web server, but since the bottelneck of the network is the 
internet connection so this will easy for us much more the capacity 
planning .. hence if you want to do a capacity planning of your 
webserver you have to concentrate on the very important part that is the 
M/M/1 internet connection and do your calculation.


Thank you,
Amine Moulay Ramdane.

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Capacity planning aminer <aminer@toto.net> - 2013-11-10 08:23 -0800
  Re: Capacity planning aminer <aminer@toto.net> - 2013-11-10 08:37 -0800
  Re: Capacity planning aminer <aminer@toto.net> - 2013-11-10 08:51 -0800

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